I bought one, wasn't lucky enough and I received the RX18P's. However, they're very very good for the price! I was astonished this was only 10 dollars, they sound like they would cost around 20~ dollars; not bad at all. However, they had very cheap construction and I had to baby them out of the packaging to ensure myself the wire wouldn't rip. These are very good backups, for whenever my Jaybird X3's or Freedom 2's die; granted they don't sound better, they're very good for the price, and can be found for much cheaper. I'll always have this pair around just as a safety net. (Was really looking forward for the M6's though.)